Portable derrick.



G. H. ROBERTS;

PORTABLE DERRICK.

APPLICATION 11.31) 21:15.10, 1909.

Patented July 13, 1909.

G. HLROBERTS.

PORTABLE DERRICK.

APPLIOATION FILED r513. 10, 1909.

927,680. Patented July 13, 19 jj 2 mum's-5mm 2.

G. H. ROBERTS.

PORTABLE DERRICK.

APPLICATION FILED FEB. 10, 1909.

927,680, Patented July 13, 1909. 24 27 4 SHEETS-SHEET a. 1:- f

C. H. ROBERTS.

PORTABLE DERRICK.

APPLICATION mum FEB-10, 1909.

Patented July 13, 1909.

CHARLES H. ROBERTS, OF EVANSVILLE, INDIANA.

PORTABLE DERRICK.

Specification of Letters Patent.

Patented July 13, 1909.

Application filed February 10, 1909. Serial No. 477,160.

To all whom it may concern:

Be it known that I, CHARLES H. ROBERTS, a citizen of the United States, residing at Evansville, county of Vanderburg, and State of Indiana, have invented certain new and useful Im rovements inPortable Derricks, of which t e following is a specification.

This invention relates to portable derricks.

The invention has for its object the provision of a derrick and vehicle associated in a novel manner, together with derrick operating means carried by the vehicle; a derrick of novel construction having improved means for swinging the jib, improved means for supporting the mast, im roved means for ad usting or extending t e mast, and improved means for guiding the cables; and a derrick combined with a vehicle in a novel fashion so as to be adapted to be readily attached to or removed therefrom, anchored when in use in order to remove the strain from the vehicle, and so constructed and arranged as to afford a convenient portable structure which can be readily moved from place to place and la idly and easily positioned and made rea y for use in hoisting operations.

The invention is set forth fully hereinafter and its novel features are recited in the appended claims.

In the accompanying drawings :-Figurc 1 is a side elevation of my improved derrick in position with the traction engine; Fig. 2, a front elevation of the same with the boom omitted; Fig. 3, an enlarged detail of the mast and boom, the former being shown in longitudinal section; Fig. 4, a detail crosssection on the line 44 of Fig. 3; Fig. 5, a detail perspective view of the upper ortion of the lower mast section; Fig. 6, a etail plan view of the turn-table; Fig. 7, a detail lan view, artly in section, showing the pn leys and ca les connecting the boom with the engine and Fig. 8, a detail side elevation of the lower portion of the upper mast section.

Any vehicle can be employed in connection with the derrick constituting the present invention, but the structure referably embraces the derrick and a suitable traction en gine which combines power of locomotion with derrick operating means, and I, therefore, preferably use a traction engine 1 of ap roved form.

ecured to the front of the traction engine 1 are clamps 2 which rigidly secure a hold er 3 having a fixed collar 4 on its lower end. "Located loosely within the holder 3 is thelower mast section 5 whose lower end is seated in a shoe 6, which has a ball 7, received in a ste 8 and provided with a ball bearing 9. 'I he step 8 has a platform 10 provided with prongs or feet 11 adapted to be sunk into the earth to form a support for the mast and jib.

Mounted loosely on the holder 3'between the lower clamp 2 and the collar 4, is aturntable 12, which has a grooved peripher .and is provided with a radial slot 13 and aresha ed slots 14.

he jib 15 has its lower end pivoted by king bolts 16 to ears on the shoe 6, said jib being rovided with a guide 17 which is locate in slot 13.

Secured to the holder 8 is a bracket 18 to which is journaled a drum 19 which carries a worm-wheel 20 in mesh with a worm 21 carried by said bracket 18. The drum 19 has cables 22 which pass through the slots 14 and are connected at 23 to the shoe 10, thus providing means whereby the entire mast, jib, step and platform may be elevated when it is desired to move the portable derrick to another position.

The up or section 24 of the mast telescopes wit in the lower section 5, bein provided with a packed piston 25 snugly fitting the interior of said tubular section 5. At frequent intervals the mast section 24 is provided with sets of holes 26 and the mast section 24 carries a two-part clamp 27 having dowels 28 which are adapted to be received in any of the sets of holes 26 so that upon suitable clamping of said clamp 27, the upper mast section 24 will be supported upon the lower mast section 5, but in order to securely connect the telescoping mast sections, I preferably provide the upper end of the section 5 with slots 29 and surround it with a clamp 30 which, on being tightened, draws the split up or end of mast section 5 tightly around the ower end of mast section 24.

The mast section 5 serves as a steam cylin der for the iston 25 on mast section 24, steam being ed to the interior of the lower part of the section 5 by a pipe 31 which is connected to the steam dome 32 of the traction engine and is controlled by a three-way valve 33 which is adapted, according to which way it is turned, to admit the steam from dome 32 to the interior of section .5 to elevate the section 24, or, to release whatever pressure there may be in the section 5 to permit the mast section 24 to be lowered to any desired extent. This construction andcaacity for adjustment in no manner intereres with the elevation of the entire mast within the holder 3 by using the gearing 20, 21, but it provides for adjustment of the mast to any desired height at any time, it being understood that the clam s 27 and 30 will be loosened and re-clampe as occasion may require, during such adjustment of the mast.

Carried .on the vehicle 1 is any approved type of winding drums, specific description belng unnecessary. These drums are driven by a shaft 34 which is belted to the engine. This shaft carries a bevel gear 35 which is adapted to mesh with either one or the other of bevel gears 36 and 37 which are loosely splined to a vertical shaft 38, suitably journaled. The ears 36 and 37 are operated by independent evers and control the swinging of the jib. The shaft 38 operates gearing 32, in turn operating a drum 40, around which 1s wound a cable 41, which passes around and is connected to the turn-table 12. According to which of the gears 36 or 37 is in mesh with gear 34, the turn-table 12 will be moved in one direction or the other and the jib similarly swung, regardless of its degree of elevation or depression. The drum 42 operates a cable 43 which passes under a swiveled sheave 44 carried by mast section 24 and thence around suitable sheaves 45, 46, 47, thus controlling the elevation and lowering of the jib 15.

The cables 48 for raising and lowering and operating the bucket 49 pass around suitable pulleys on the jib and onto the drums 50. These cables pass on opposite sides of the Smokestack and on opposite sides of a drum 51, which loosely turns on holder 3, being provided with interposed roller bearings 52 to minimize friction, said drum being interposed between upper and lower brackets 53 secured to holder 3. The brackets 53 also form a sup ort for idler drums 54. Conseuently, w ether the jib be turned to the right or left, both cables 48 are running freely over idlers and thus any entangling of said cables is prevented.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a portable derrick, the combination with a motive-fluid o erated traction engine or the like, of a derric adapted to be carried thereby which is provided with a motivefiuid o erated extensible mast,' and means for utilizing the motive fluid of the engine for extending the mast.

2. In a portable derrick, the combination with a movable vehicle, of a derrick adapted to be carried thereby having asubstantlally vertically reciprocatable mast, and means for moving the mast up or down so that it may be supported by theground when in use or elevated to permit travel of the vehicle.

3. In a portable derrick, the combination 1 A with a movable vehicle, of a derrick, and means detachably securing the derrick to the vehicle permitting it to be bodily removed from the vehicle.

4. In a-portable derrick, the combination with a movable vehicle, of attaching devices secured to one end of the vehicle, and a derrick detachably held by said attaching devices.

5. In a portable derrick, the combination with a movable'vehicle, of a mast carried thereby adapted to be raised or lowered, a turn -table rotatable with the mast and which has openings, a jib operated by the turn-table, a drum above the turn-table, cables operated by the drum which pass throu h the openings aforesaid and are operativey connected to the mast below the turn-table,

and means for turning the turn-table.

6. In a portable derrick, the combination with a motor vehicle, of a derrick whose mast is connected to the vehicle, means for su orting the mast to relieve the motor vehic e iiom the weight thereof and of the load when in operation, ppwer operated self-contained means carried y the motor vehicle for swinging the jib, and power operated means carried by the motor vehicle for operating the jib and its load.

7. In a derrick, a mast com osed of telescoping sections, one of which as openings, in combination with a releasable clamp adapted to embrace the section having openings, said clamp having dowels or pins adapted to enter said openings and being engageable with the other of the telescoping sections.

8. In a derrick, the combination with a mast and a jib, of a loose drum arranged concentrically of the mast, and cables disposed on op osite sides of said drum which run to the ji 9. In a derrick, the combination with a support, of a holder attached thereto, a mast ad ustable up and down in said holder, means for adjusting said mast up and down in said holder, said mast having an extensible part, and means for adjusting said extensible part of the mast. I

10. In a derrick, the combination with a support, of a holder attached thereto, a mast ad ustable up and down in said holder, means for adjusting said mast up and down in said holder, said mast being composed of telescoping sections, one acting as a cylinder and the other as a piston, and means for controlling the supply of motive fluid pressure to the cylinder of said extensible mast.

,11. In a derrick, the combination with a support and a mast holder, of a mast adjusta b e in said holder wherebyit may be positioned at different heights, a jib, a turn-table which is loose in relation to the adjustable mast, said jib being operated by the turn-' table, and means for turning said turn-table.

12. In a derrick, the combination with a support, of a mast holder, a mast adjustable in said holder, a turn-table loosely encircling the mast and provided with openings, a jib carried by the mast and operated by the turntable,- and means for raising and lowering the mast comprising operating mechanism located 'above the turn-table and cables operated by said operating mechanism which pass through the openings in the turn-table and are connected to the mast.

13. In a portable derrick, the combination with a vehicle and a Winding drum carried by said vehicle, of a mast carried by said vehicle, a jib carried by the mast, means for swinging the jib, an idler drum or pulley loosely oncircling the mast, idlers positioned on opposite sides of said idler drum or pulley, and cables running from the drum carried by the vehicle which pass on opposite sides of the idler drum or pulley and thence to the jib.

In testimony whereof, I hereunto afiiX my 25 signature in presence of two Witnesses. CHARLES H. ROBERTS.

Witnesses:

F. C. GORE, CARRIE BEST. 

